Wait, wasn't it supposed to be a baseball game where we throw balls at enemies/throw enemies at other enemies or targets/throw enemies really far? Damn...
Quoting a previous review : "Not Zombie Baseball 2[...]it should be made as a standalone game rather than a sequel"
This reminds me of a school series which also pulled a genre shift(different environments rather than different gameplay), first 3 games is about escaping school(because the player is bored at school), and the 3 next games are not in a school environment or in an educational environment(or even in an university). While the sixth game stopped having school in the title, the two other games still have school in it. And the 4th "game" is just a short prequel to the 5th.